Boston Scientific Corp
Held by 18 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 101137107 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
In plain English: 18 of the investors we track own this stock. In the latest quarter, 9 of them bought more of it and 11 sold some or all of theirs (2 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Managers holding
18
-1 vs last quarter (like-for-like)
Total value held
$3.51B
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.1%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
-$1.22B
-31.8% vs last quarter
Net shares bought
+146.4K
Est. net flow -$44.14M
Quarter activity
9 bought · 11 sold
2 new · 3 sold out
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns BSX?
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Who owns BSX? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value | % of their portfolio ↓ | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | David Shaw | D.E. Shaw & Co. | 25.46M | $1.09B | 0.7% | Added | +1.1M | +4.7% | +$48.87M |
| 3 | Two Sigma | Two Sigma Investments | 19.36M | $826.24M | 0.6% | Added | +9.9M | +105.7% | +$424.57M |
| 8 | Causeway | Causeway Capital Management | 720.34K | $30.74M | 0.3% | New | +720.3K | — | +$30.74M |
| 9 | Mawer | Mawer Investment Management | 530.53K | $22.64M | 0.2% | Reduced | -59.1K | -10.0% | -$2.52M |
| 5 | Israel Englander | Millennium Management | 5.44M | $210.74M | 0.1% | Added | +1.1M | +25.4% | +$42.62M |
| 6 | Jim Simons | Renaissance Technologies | 2.41M | $102.94M | 0.1% | Reduced | -740.0K | -23.5% | -$31.58M |
| 7 | Parnassus Investments | Parnassus Investments LLC | 1.17M | $50.14M | 0.1% | Reduced | -6.8M | -85.3% | -$291.46M |
| 4 | Ken Griffin | Citadel Advisors | 4.99M | $212.88M | 0.1% | Added | +770.4K | +18.3% | +$32.88M |
| 14 | Larry Robbins | Glenview Capital | 113.10K | $4.83M | 0.1% | New | +113.1K | — | +$4.83M |
| 2 | Norges Bank | Norges Bank Investment Management | 21.17M | $903.54M | 0.1% | — | — | — | — |
| 10 | Ray Dalio | Bridgewater Associates | 442.04K | $18.87M | 0.1% | Added | +365.0K | +474.1% | +$15.58M |
| 13 | Diamond Hill | Diamond Hill Capital Management | 157.83K | $6.74M | 0.1% | Added | +7.7K | +5.1% | +$329.28K |
| 16 | Mario Gabelli | GAMCO Investors | 64.56K | $2.76M | 0.0% | Reduced | -90.6K | -58.4% | -$3.87M |
| 11 | Steve Cohen | Point72 Asset Management | 365.24K | $15.59M | 0.0% | Reduced | -3.3M | -90.1% | -$141.79M |
| 12 | Ken Fisher | Fisher Asset Management | 333.53K | $14.24M | 0.0% | Reduced | -117.1K | -26.0% | -$5.00M |
| 17 | Jeremy Grantham | GMO | 21.80K | $930.42K | 0.0% | Added | +6.8K | +45.3% | +$290.22K |
| 15 | Dodge & Cox | Dodge & Cox | 87.48K | $3.73M | 0.0% | Reduced | -1.4K | -1.6% | -$59.75K |
| 18 | Polen Capital | Polen Capital Management | 4.75K | $202.73K | 0.0% | Reduced | -575.0K | -99.2% | -$24.54M |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| Fred Alger | Fred Alger Management | -1.5M | $91.28M |
| Sands Capital | Sands Capital Management | -736.1K | $46.19M |
| Stephen Mandel | Lone Pine Capital | -104.7K | $6.57M |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ro Khanna Politician | Sep 11, 2026 | BSX | BOSTON SCIENTIFIC CORP COMMON STOCK scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Oct 7, 2026 | 26 days | PTR ↗ |
| Ro Khanna Politician | Sep 4, 2026 | BSX | BOSTON SCIENTIFIC CORP COMMON sp STOCK scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Oct 7, 2026 | 33 days | PTR ↗ |
| Kevin Hern Politician | Sep 4, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale (partial) | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | Joint | Hern Family Revocable Trust | Sep 25, 2026 | 21 days | PTR ↗ |
| Kevin Hern Politician | Sep 3, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Child | Gabrielle Ashtyn Hern Trust | Sep 25, 2026 | 22 days | PTR ↗ |
| Kevin Hern Politician | Sep 3, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Child | Kelby Austin Hern Trust | Sep 25, 2026 | 22 days | PTR ↗ |
| Kevin Hern Politician | Sep 3, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Child | Kaden Everett Hern Trust | Sep 25, 2026 | 22 days | PTR ↗ |
| Kevin Hern Politician | Sep 9, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | Joint | Hern Family Revocable Trust | Sep 25, 2026 | 16 days | PTR ↗ |
| Kevin Hern Politician | Aug 31, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Joint | Hern Family Foundation | Sep 25, 2026 | 25 days | PTR ↗ |
| Gil Cisneros Politician | Aug 18, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Sep 10, 2026 | 23 days | PTR ↗ |
| Ro Khanna Politician | Aug 10, 2026 | BSX | BOSTON SCIENTIFIC CORP COMMON STOCK 7 scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Sep 4, 2026 | 25 days | PTR ↗ |
| Ro Khanna Politician | Aug 3, 2026 | BSX | BOSTON SCIENTIFIC CORP COMMON STOCK scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Sep 4, 2026 | 32 days | PTR ↗ |
| Ro Khanna Politician | Jul 7, 2026 | BSX | BOSTON SCIENTIFIC CORP COMMON STOCK scanned | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Aug 7, 2026 | 31 days | PTR ↗ |
| Ro Khanna Politician | Jun 2, 2026 | BSX | BOSTON SCIENTIFIC CORP. COMMON STOCK : scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Child | — | Jul 6, 2026 | 34 days | PTR ↗ |
| Ro Khanna Politician | Jun 16, 2026 | BSX | BOSTON SCIENTIFIC CORP. COMMON STOCK scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jul 6, 2026 | 20 days | PTR ↗ |
| Ro Khanna Politician | Jun 30, 2026 | BSX | BOSTON SCIENTIFIC CORP. COMMON STOCK scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jul 6, 2026 | 6 days | PTR ↗ |
| Gil Cisneros Politician | Jun 5, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Jul 2, 2026 | 27 days | PTR ↗ |
| Gil Cisneros Politician | Jun 5, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Jul 2, 2026 | 27 days | PTR ↗ |
| Ro Khanna Politician | May 15, 2026 | BSX | BOSTON SCIENTIFIC CORP. COMMON STOCK scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jun 9, 2026 | 25 days | PTR ↗ |
| Gil Cisneros Politician | May 11, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Jun 8, 2026 | 28 days | PTR ↗ |
| Gil Cisneros Politician | May 19, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Jun 8, 2026 | 20 days | PTR ↗ |
| Gil Cisneros Politician | May 29, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Jun 8, 2026 | 10 days | PTR ↗ |
| Ro Khanna Politician | Apr 13, 2026 | BSX | BOSTON SCIENTIFIC CORP. COMMON gp STOCK scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | May 11, 2026 | 28 days | PTR ↗ |
| Ro Khanna Politician | Apr 24, 2026 | BSX | BOSTON SCIENTIFIC CORP. COMMON STOCK scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | May 11, 2026 | 17 days | PTR ↗ |
| Gil Cisneros Politician | Feb 10, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Mar 9, 2026 | 27 days | PTR ↗ |
| Gil Cisneros Politician | Jan 30, 2026 | BSX | Boston Scientific Corporation Common Stock (BSX) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Feb 13, 2026 | 14 days | PTR ↗ |